<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style type="text/css">
        .box {
            width: 300px;
            height: 150px;
            background: pink;
            padding: 75px 100px;
        }
        
        .smallbox {
            width: 300px;
            height: 150px;
            background: red;
        }
    </style>
</head>

<body>
    <div class="box">
        <div class="smallbox"></div>
    </div>
</body>

</html>